The industrial strength Super Slim High Lumen UFO High Bay has the highest lumen output of all Apex Lighting's round high bays. This innovative luminaire comes with a tempered glass lens with UV Stabilizer with precise optical control and heat radiating fins for superior thermal management. Optional motion sensors can be added for an even greater amount of energy savings. A optional battery backup is available for greater safety. Hook mount included with fixture or 3/4" conduit pendant mount.